Apparatus using amorphous magnetic compositions

A magnetic system, comprising:

• an amorphous magnetic medium having no long range atomic ordering and having long range magnetic ordering and magnetic uniaxial anistropy which is not due to long range crystalline structure, said medium having magnetic domains therein,
• means for producing selected magnetization states of said domains, and
• sensing means for sensing the magnetization state of said domains.

An article of manufacture useful as a permanent magnet, said article being an amorphous magnetic medium without long range atomic ordering, said medium having long range magnetic order and magnetic uniaxial anisotropy which is not due to long range crystalline structure, high magnetic moment 4.pi.M.sub.s, high Curie temperature T.sub.c, and high coercivity H.sub.c.

A magnetic bubble domain system, comprising:

• a magnetic sheet in which said bubble domains exist,
• a permanent magnet located adjacent said magnetic sheet for providing a magnetic bias field in said sheet which is substantially normal to the plane of said sheet, said permanent magnet being comprised of an amorphous magnetic material having uniaxial anisotropy, and
• means for manipulating said domains in said sheet.

A magnetic recording system, comprising:

• an amorphous magnetic medium having no long range atomic ordering and having conduction electrons therein, said medium having long range magnetic order and uniaxial magnetic anisotropy which is not due to long range crystalline structure, said medium being capable of supporting magnetic domains therein,
• writing means for producing selected magnetic states of domains in said amorphous magnetic material, and
• sensing means for sensing the magnetization state of domains in said amorphous magnetic medium.

A magnetic apparatus, comprising:

• an amorphous magnetic medium having no long range periodic atomic order, said medium having long range magnetic order and magnetic anisotropy which is not due to long range crystalline structure, said medium being capable of supporting different states of magnetization therein,
• means for producing a selected magnetization state in said medium, and
• means for sensing the magnetization state of said medium.

In a magnetic bubble domain apparatus having a magnetic medium in which said bubble domains exist and means for sensing said domains, said medium being comprised of an amorphous magnetic material exhibiting long range magnetic order and a magnetic uniaxial anisotropy which is not due to long range crystalline structure of the medium, said medium having an amorphous atomic structure without long range periodic atomic ordering.

In a magnetic bubble domain apparatus having writing means for producing said domains in a magnetic medium and means for sensing said domains, said magnetic medium being comprised of an amorphous magnetic material having long range magnetic order and magnetic uniaxial anistropy which is not due to long range crystalline structure, said medium being structurally amorphous and exhibiting no long range periodic atomic ordering.

A magnetic apparatus, comprising:

• a magnetic medium in which a localized region can have a selected magnetization state, said medium being comprised of a structurally amorphous magnetic material without long range periodic atomic ordering and having magnetic anistropy which is not due to long range crystalline structure, and
• writing means for producing said selected magnetization state in said localized region.

A magnetic apparatus, comprising;

• a medium having an amorphous structure characterized by the absence of both long range periodic atomic ordering and long range crystalline structure, said amorphous medium having long range magnetic ordering and a magnetic uniaxial anistropy due to localized ordered clusters of atoms in said medium, said medium being capable of supporting different states of magnetization therein,
• means for producing a selected magnetization state in said medium, and
• means for sensing the magnetization state of said medium.

A magnetic apparatus comprising:

• a magnetic medium having an amorphous structure characterized by the absence of both long range periodic atomic ordering and long range crystallinity, said medium having a magnetic anistropy due to phase separations in the medium, said medium being capable of supporting different states of magnetization therein,
• means for producing a selected magnetization state in said medium, and
• means for sensing the magnetization state of said medium.

A magnetic apparatus, comprising:

• a magnetic medium having an amorphous structure characterized by the absence of both long range atomic order and long range crystallinity, said magnetic medium having long range magnetic ordering and unaxial magnetic anisotropy due to pair ordering of atoms in said magnetic medium, said medium being capable of supporting different states of magnetization therein,
• means for producing a selected magnetization state in said medium, and
• means for sensing the magnetization state of said medium.

A magnetic apparatus comprising:

• a medium having an amorphous structure characterized by the absence of both long range periodic atomic ordering and long range crystallinity, said medium having long range magnetic ordering and a magnetic uniaxial anisotropy which is due to regions of different composition located adjacent to one another in said medium, said medium being capable of supporting different states of magnetization therein,
• means for producing a selected magnetization state in said medium, and
• means for sensing the magnetization state of said medium.

A magnetic apparatus, comprising:

• a medium having an amorphous structure characterized by the absence of long range periodic atomic ordering and long range crystallinity, said medium having long range magnetic ordering and a magnetic uniaxial anisotropy which is due to shape anisotropy, said medium being capable of supporting different states of magnetization therein,
• means for producing a selected magnetization state in said medium, and
• means for sensing the magnetization state of said medium.

A magnetic apparatus, comprising:

• a medium having an amorphous structure characterized by the absence of both long range periodic atomic ordering and long range crystallinity, said medium having long range magnetic order and a magnetic uniaxial anisotropy due to anisotropies in short range structural or compositional ordering, said medium being capable of supporting magnetic domains having different states of magnetization therein,
• means for producing a selected magnetization state in said domains, and
• means for sensing the magnetization state of said domains.